Nortel Networks 553-3001-211 manual Equipment, Mdf

Page 592 of 894 NT8D14 Universal Trunk card

Figure 135

Connecting RAN equipment to the NT8D14 Universal Trunk card (typical)

System						Cross connect			Typical customer-
									provided external
NT8D37									equipment
IPE Module
NT8D14				Module
			I/O Panel
Universal		Slot 0
			Connector			MDF
Trunk Card			A						Announcer
		0T	26	(W-BL)		Audio			T
		0R		(BL-W)					Ref
											Voice
			1			pair
Unit 0									R		signal
		0CP		(W-O)
			27
						Signal
		0MB		(O-W)
									C
			2			pair
									Com		Control
						Part of
							Part of	NC	MC		relay
Unit 1						25-pair	25-pair
						cable	cable		B
									Com		Busy
							Note 1	NC	MB		relay
						Parallel
									ST+
Unit 7						trunk
						connection				Opto-	Start
						(Note 2)			STÐ	isolator
								48 V
									Tel
								ground
Note 1: For	continuous operation mode, connect the trunk unit MB line to the announcer B line
only and ground the announcer ST+ line. For pulse start or level start modes, connect the trunk
unit MB line to the announcer ST+ line only and leave the announcer B line unconnected.
Note 2: A maximum of 24 universal trunk card units can be paralleled to a single announcer
hannel.
										553-AAA1149
553-3001-211		Standard 2.00			September 2004